2600K: New to OC, running into something strange.

[Kiwiandapple]

Hello guys,

Here is my speccy off the system that im using:
Click! I use a Sycthe Mugen 2 rev b CPU Cooler and Corsair TX650 v2 PSU.
Here are screenshots off my bios settings:
Click!

I just started with OC'ing and im new to this. I am now under volting the Core voltage. I followed the steps that tom did in his 1155 OC guide. So I did set the loadline calibration to extreme.

Here is the graph after 5mins off stress test in OCCT. I set the vcore to 1.09V and its bumping it up to 1.1V when the CPU is being stressed?

As far as I know this shouldn't happen? Why could this be? Did I miss something, I watched the video in small steps in windows. Then went into the bios and had my phone with the guide running. As far as I know I did exactly what Tom did. If you need anymore screenshots then please ask and I can give them.

Ps: I don't know why but tom said I upload my images in the wrong way, I always use hyperlinks so, if that's not the correct way please tell me what is?

Thanks for the help!

 

[EddWills95]

I'm pretty sure that because of the LLC it boost the voltage going to the CPU in order to keep it stable...

LLC applies additional voltage to the CPU to combat vdroop so that when switching to load, there is sufficient voltage to keep that frequency stable.

http://linustechtips.com/main/topic/24019-load-line-calibration-why-overclockers-should-care/

Hope that article helps somewhat, it did for me because I had no idea what it was.

 

[Kiwiandapple]

Ok thank you,

I will have a read on that. But just to be sure, I can just undervolt it more without a problem?

 

[EddWills95]

Undervolting is never a problem, just make sure that its stable.

The point of undervolting is to give you more headroom when overclocking and to get temps and stuff down

But the LLC will knock it up to try and keep it stable.

 

[Kiwiandapple]

Allright, that makes sence. Thanks a bunch, I will have a close look at it! I don't think I can use a multimeter on this board (Gigabyte Z77X-UD3H) to messure the true volts. So I'll have to do with the numbers given to me.

 

[EddWills95]

I don't know that board specifically but yeah i'm sure they're pretty close.

like i say mate, undervolting is never bad. its just when you start getting passed about 1.4v (which is where i'm at) you should maybe be a little concerned.

Just make sure you have some good cooling when you get to that point.

 

[Kiwiandapple]

Allright, so .. I haven't watched further then about 30mins into the guide. So I am not aware yet what the next step is after I find the lowest my Vcore goes to, Currently had a stable test at 1.09V (1.1v)
Now doing another test with 1.08V set and it's currently at 1.092V
This will be my last test and I will continue this tomorrow. 2AM

But thank's I got a little wiser in this OCing world. My CPU Cooler isn't bad but not the best, so i'll be happy to reach 4,2/3 without hitting 1.4V yet. I will get a AIO in the near future, then I will see how high I can go.

 

[EddWills95]

Well with my 2600k i'm at 4.7GHz at 1.41v

And my top temps are about 80 ish with my h100i

it'll be easy

 

[Kiwiandapple]

I don't have a WC yet, but im about to start OCing now. I hit my lowest vcore off 1.06 and will test 1.05 now! I will update if I run into more troubles! Thanks for the help.

Edit: Ok, so far it's going amazing. I do get blue screens if my vcore is to low, but following the steps that Tom did I can get back into windows. I was a little worried at first, at 1.1v I could not get it stable at 4,0ghz. Had to up it all the way to 1,75v before it would pass a 30min stress test. But right now im on 4,4ghz @ 1.275v and max temps are 56,60,64,64. I do notice that my core 0 is useally pretty low when it's getting stressed compared to the other 3. and core 2/3 are useally about the same and much higher then core 0. But those tempatures are pretty amazing so far I think!

I do know that once you start to hit 1.3V and up tempatures start to increase very quickly. But have to see, so far i'm very happy with the results!

Edit2: Can ignore this. I figured it out lol. I set the duration to 30mins. And idle periods at the end was set on 5mins. So there we go, that fish out off the water! Oke, something strange just happend. After 25mins off stress testing the CPU useage went back to normal, but it still kept testing. No errors. Here are the logs off that test. If you need any more logs, then please say and ill upload those. I know that the memory isn't set at 90%. I wanted to use chrome during the stress test and I tought if I would set it abit lower, I could use chrome without to much stressing the RAM.

Edit3: 4,5ghz @ 1.275V last stress test off this night!

Edit4: 4,5ghz crashed after about 15mins, so went to 1.3V and that was stable.
Then tried to get 4,6 and had to use 1.325V to get it stable. Will see later on how much i need to get 4,7/8. But im happy with this so far.